There are different kinds of sentences. 

A statement is a sentence that tells something. It begins with a capital letter and ends with a period.

A question is a sentence that asks something. It begins with a capital letter and ends with a question mark.

• Example: The apples are tasty. Where did you get these apples?

To tell if a sentence is a statement or a question, I ask:

• Does the sentence tell something or ask something?
• Does it end with a period or a question mark?

The first sentence tells me those apples are tasty. The sentence begins with a capital letter and ends with a period. This sentence is a statement.

The second sentence asks where you bought the apples. It also begins with a capital letter, but it ends with a question mark. This sentence is a question.

Let’s review the sentences below to identify the type of sentence (statement or question), and if they should end in a question mark (?) or a period (.).

• The library is full of books. (This is a statement and should end with a period: .)
  
  
• Do you like books? (This is a question and should end with a question mark: ?)
  
  
• What kind of books do you like? (This is a question and should end with a question mark: ?)
  
  
• Sam likes books about nature. (This is a statement and should end with a period: .)
  
  
• Maria reads all kinds of books. (This is a statement and should end with a period: .)